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[v3,3/3] slab: delete useless RED_INACTIVE and RED_ACTIVE

Message ID 20240607-b4-slab-debug-v3-3-bb2a326c4ceb@linux.dev (mailing list archive)
State New
Headers show
Series slab: fix and cleanup of slub_debug | expand

Commit Message

Chengming Zhou June 7, 2024, 8:40 a.m. UTC 
These seem useless since we use the SLUB_RED_INACTIVE and SLUB_RED_ACTIVE,
so just delete them, no functional change.

Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Chengming Zhou <chengming.zhou@linux.dev>
---
 include/linux/poison.h       | 7 ++-----
 mm/slub.c                    | 4 ++--
 tools/include/linux/poison.h | 7 ++-----
 3 files changed, 6 insertions(+), 12 deletions(-)
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Patch

diff --git a/include/linux/poison.h b/include/linux/poison.h
index 1f0ee2459f2a..9c1a035af97c 100644
--- a/include/linux/poison.h
+++ b/include/linux/poison.h
@@ -38,11 +38,8 @@ 
  * Magic nums for obj red zoning.
  * Placed in the first word before and the first word after an obj.
  */
-#define	RED_INACTIVE	0x09F911029D74E35BULL	/* when obj is inactive */
-#define	RED_ACTIVE	0xD84156C5635688C0ULL	/* when obj is active */
-
-#define SLUB_RED_INACTIVE	0xbb
-#define SLUB_RED_ACTIVE		0xcc
+#define SLUB_RED_INACTIVE	0xbb	/* when obj is inactive */
+#define SLUB_RED_ACTIVE		0xcc	/* when obj is active */
 
 /* ...and for poisoning */
 #define	POISON_INUSE	0x5a	/* for use-uninitialised poisoning */
diff --git a/mm/slub.c b/mm/slub.c
index 1551a0345650..efa7c88d8d8c 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1230,8 +1230,8 @@  static int check_bytes_and_report(struct kmem_cache *s, struct slab *slab,
  * 	Padding is extended by another word if Redzoning is enabled and
  * 	object_size == inuse.
  *
- * 	We fill with 0xbb (RED_INACTIVE) for inactive objects and with
- * 	0xcc (RED_ACTIVE) for objects in use.
+ * 	We fill with 0xbb (SLUB_RED_INACTIVE) for inactive objects and with
+ * 	0xcc (SLUB_RED_ACTIVE) for objects in use.
  *
  * object + s->inuse
  * 	Meta data starts here.
diff --git a/tools/include/linux/poison.h b/tools/include/linux/poison.h
index 2e6338ac5eed..e530e54046c9 100644
--- a/tools/include/linux/poison.h
+++ b/tools/include/linux/poison.h
@@ -47,11 +47,8 @@ 
  * Magic nums for obj red zoning.
  * Placed in the first word before and the first word after an obj.
  */
-#define	RED_INACTIVE	0x09F911029D74E35BULL	/* when obj is inactive */
-#define	RED_ACTIVE	0xD84156C5635688C0ULL	/* when obj is active */
-
-#define SLUB_RED_INACTIVE	0xbb
-#define SLUB_RED_ACTIVE		0xcc
+#define SLUB_RED_INACTIVE	0xbb	/* when obj is inactive */
+#define SLUB_RED_ACTIVE		0xcc	/* when obj is active */
 
 /* ...and for poisoning */
 #define	POISON_INUSE	0x5a	/* for use-uninitialised poisoning */